CYPERACEAE (SEDGE FAMILY) 



239 



466. C. paup., v. 

 irrigua. 



467. C.limosa. 



468. C. rariflora. 



so and exceeding the culm ; spikes 2-3, approximate, all slen- 

 derly stalked, spreading or drooping, 4-8 mm. long ; perigynia 

 orbicular or broad-ovate, nerved in the middle, -f the length 

 of the castaneous scales. Alpine bogs, e. Que. Aug. 



Var. irrigua ( Wahlenb.) Fernald. Taller, 1-8 dm. high; 

 culm glabrous; spikes cylindric, 1-1.6 cm. long; scales cas- 

 taneous. (C. magellanica Man. ed. 6, not Lam.) Bogs, 

 Arctic regions, s. to Mass., Pa. , Ont. , and Utah. June-Aug. 

 (Eu.) FIG. 466. 



Var. pallens Fernald. Tall, the culms usually 

 scabrous ; spikes cylindric, 1-1.8 cm. long ; scales 

 green with pale brown or yellowish margins. 

 Bogs and mossy woods, e. Que. to B. C., s. to Ct., 

 N. Y., Mich., and Minn. June, July. 



112. C. limftsa L. Slender but rather stiff, 

 1.5-6 dm. high, very stoloniferous ; culm sharp, 

 rough above ; spikes 1-2, nodding on short stalks or the upper one 

 erect, subcylindric, 1-2.5 cm. long, springing from the axil of a 

 very narrow bract which is nearly always shorter than the culm ; 

 perigynia very short-pointed, about the length of 

 the broad brown or purplish scales. Bogs, e. Que. 

 to Sask. and B. C M s. to Pa., Great Lake region, 

 Col., and Cal. May-Aug. (Eu.) FIG. 467. 

 113. C. rarifldra Smith. Very small but stiff, 0.7-3.5 dm. 

 high, slightly stoloniferous ; culm obtuse and very smooth ; spikes 

 1-3, only 3-10-flowered, drooping, 

 borne in the axil of a minute awl-like 

 and purple-auricled bract; perigynia 

 ovate, nearly pointless, obscurely 

 nerved, mostly a little shorter than 

 the purple-black enveloping scales. Cold bogs and 

 granitic slopes, Arctic regions ; very locally s. to 

 Gulf of St. Lawrence ; Table-topped Mt., Gaspe Co., 

 Que. ; and Mt. Katahdin, Me. (Goodale). (Eu.) 

 FIG. 408. 



114. C. littoralis Schwein. Somewhat slender 

 but erect, 4-9 dm. high, stoloniferous ; leaves 3-6 mm. 

 broad, stiff, flat, glaucous, shorter than the sharp 

 and nearly smooth often solitary culms ; staminate 

 spikes 1-3, dark purple, 5.5 cm. long or less, the 

 scales obtuse ; pistillate spikes 1-4, 

 somewhat approximate, on thread- 

 like peduncles, narrowly cylindric 

 (2-5 cm. long, 5-7 mm. thick), usu- 

 ally staminate at top ; perigynia 

 lance-oval, faintly nerved, the minute 

 beak entire, mostly longer than the 

 obtuse purple scale ; bracts promi- 

 nently purple-auricled. Wet woods 

 and bogs, oftenest near the coast, 

 May, June. FIG. 469. 



115. C. prasina Wahlenb. Slender, somewhat flexuous, 3-7 

 dm. high; culm rather sharp, smooth ; leaves 2.5-5 mm. wide, 

 soft and flat, rough ; spikes 2-4, li?iear-cylindric, peduncled and 

 spreading or drooping, somewhat approximate, green, 1.5-6 cm. 



long, loosely flowered ; perigynia pale, thin, nearly nerveless, produced into a 

 short but slender entire or minutely toothed beak ; scale very thin and acute, 

 nearly colorless. Wet woods and glades, w. Me. to Ont., Mich., D. C., and 

 Del. ; and along the mts. to Ga. May-July. FIG. 470. 



116. C. picta Steud. Kather weak, 1.5-3 dm. high ; leaves flat and firm, 



C. littoralis. 



Ct., and south w., local. 



